Well, I'd like my writing and my code to be something I can share with other people freely, but not let it be part of a data set some company uses in their for-profit product.

Of course, a crawler can also mock user agents and fetch data in patterns that emulate real users and there'd be no way to tell - but maybe we could supply real-seeming data (at least to the crawlers we can identify) and that'll be good enough?